Re: Using stored class member funcs in TTrees

From: Rene Brun (Rene.Brun@cern.ch)
Date: Thu Mar 09 2000 - 08:30:57 MET


Hi Gene,
float and Float_t are identical for Root.
Could you send me a small file and a small macro showing
the problem ?

Rene Brun

Gene Van Buren wrote:
> 
> I found out why TTree was returning zeros for the
> results of using member functions of my class
> in TTree::Draw() and Scan() calls:
> 
> I used "float" instead of "Float_t" for the return
> value of the member function. TTreeFormula
> interpreted "float" as being something whose
> value it could not return.
> 
> On a side note, it does appear that Scan() is
> not as stringent as Draw() for determining
> the validity of a TLeaf name. If I give it a
> bogus name, Scan() just chugs away with
> garbage returned.
> 
> -Gene Van Buren



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